Their sale starts on 19th January but i just got sent this email allowing booking to be made from today

From the Travelzoo Newsdesk:

NATIONWIDE–17 January, 2011–Corinthia Hotels just launched a sale, cutting up to 50% off room rates at six 5-star hotels across Europe. Prices start from as low as £36 per room, per night.
Travelzoo subscribers have been given exclusive access to the sale before it officially opens to the public on19 January. Rates are valid seven days a week until the endof 2011 (a 2-night minimum stay applies). Here’s a sample of the lowest available rates: –

Book by 28 February. We found the best availability at the lowest prices in January and February, but the 50% discount is valid all year. To book this offer with Corinthia Hotels, use the link belowand click on the individual hotel names:http://www.travelzoo.com/uk/newsflash/15274272-957938/

Note: Rates are room-only and include tax. All prices willbe listed in euro on Corinthia’s website and have been converted using xe.com. Discounts apply to Best Available Rates.